Forward Clutch Assembly

Symptom Chart

Forward Clutch

For forward (1, 2, 3, 4) clutch operation, REFER to: Transmission Description . Refer to: Forward Clutch Assembly .

Forward Clutch

Condition	Possible Sources	Action
Forward (1, 2, 3, 4) clutch does not apply	SSA solenoid filter blocked	CLEAN or INSTALL a new solenoid. Refer to: Solenoid .
	SSA is mechanically stuck OFF	INSTALL a new solenoid. Refer to: Solenoid .
	Forward (1, 2, 3, 4) clutch regulator valve stuck OFF	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
	VBS 1234, VBSC 1234, and C1234	DISASSEMBLE and INSPECT the main control and separator plate passages for debris/blockage. CLEAN as necessary. Refer to: Transmission Description .
	Forward (1, 2, 3, 4) clutch main control-to-transmission case	REMOVE the main control valve body, Refer to: Main Control Valve Body . INSPECT the seal between the main control valve body and the transmission case for missing or damaged seal. INSTALL a new seal.
	Front planetary sun gear and shell assembly	INSPECT the sun gear and shell for wear and damage. INSTALL new components as necessary. Refer to: Transmission .
	Forward (1, 2, 3, 4) clutch snap ring	INSPECT the snap ring for proper seating in case. Refer to: Transmission .
	Forward (1, 2, 3, 4) clutch steel plate	DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch steel plates. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
	Forward (1, 2, 3, 4) clutch friction plates	DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
	Forward (1, 2, 3, 4) clutch piston seal leakage.	INSTALL a new forward (1, 2, 3, 4) clutch piston. Refer to: Forward Clutch Assembly .
-	Center support cracked or leaking.	INSPECT the center support for damage. INSTALL new components as necessary. Refer to: Transmission .
Forward (1, 2, 3, 4) clutch always applied	SSA solenoid damaged	INSTALL a new solenoid. Refer to: Solenoid .
	SSA mechanically stuck ON	INSTALL a new solenoid. Refer to: Solenoid .
	Forward (1, 2, 3, 4) clutch regulator valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
	VBS 1234, VBSC 1234, and C1234	DISASSEMBLE and INSPECT the main control valve body and separator plate passages for leakage. Refer to: Transmission Description . INSTALL new components as necessary.
	Front planetary sun gear and shell assembly	INSPECT the sun gear and shell for damage that would prevent free rotation. INSTALL new components as necessary. Refer to: Transmission .
	Forward (1, 2, 3, 4) clutch friction plates	DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
	Forward (1, 2, 3, 4) clutch piston return spring	INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
Forward (1, 2, 3, 4) clutch delayed/soft/slipping apply	Incorrect Transmission Strategy programmed into PCM	Remove SSA and record solenoid band number. Refer to: Solenoid . Using the scan tool, verify the correct band number is stored in the PCM. If band numbers do not match, replace SSA with correct band number.
	SSA solenoid filter partially blocked or restricted	CLEAN or INSTALL a new solenoid. Refer to: Solenoid .
	SSA mechanically sticking	INSTALL a new solenoid. Refer to: Solenoid .
	Forward (1, 2, 3, 4) clutch regulator valve sticking	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
	Forward (1, 2, 3, 4) clutch valve stuck ON	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch latch valve and spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
VBS 1234, VBSC 1234, and C1234		DISASSEMBLE and INSPECT the main control valve body and separator plate passages for debris/blockage. CLEAN as necessary. Refer to: Transmission Description .
Forward (1, 2, 3, 4) clutch main control-to-transmission case	DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
Forward (1, 2, 3, 4) clutch friction and steel plates.	DISASSEMBLE and INSPECT the low One-Way Clutch (OWC)/forward (1, 2, 3, 4) clutch pressure plate. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
Forward (1, 2, 3, 4) clutch piston return spring	INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
Center support cracked or leaking.	INSPECT the center support for damage. INSTALL new components as necessary.
Forward (1, 2, 3, 4) clutch harsh apply	Incorrect Transmission Strategy programmed into PCM	Remove SSA and record solenoid band number. Refer to: Solenoid . Using the scan tool, verify the correct band number is stored in the PCM. If band numbers do not match, replace SSA with correct band number.
	SSA mechanically sticking	INSTALL a new solenoid. Refer to: Solenoid .
	Forward (1, 2, 3, 4) clutch regulator valve sticking	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch regulator valve and spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
	Forward (1, 2, 3, 4) clutch latch valve sticking	DISASSEMBLE, CLEAN and INSPECT the forward (1, 2, 3, 4) clutch latch valve and spring. If bore, valve or spring is damaged, INSTALL a new main control valve body. Refer to: Main Control Valve Body .
	VBS 1234, VBSC 1234, and C1234 hydraulic circuits leaking	DISASSEMBLE and INSPECT the main control and separator plate passages for leakage. INSTALL new components as necessary. Refer to: Main Control Valve Body .
	Forward (1, 2, 3, 4) clutch piston return spring	INSPECT the return spring for proper installation and damage. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .
	Forward (1, 2, 3, 4) clutch friction and steel plates	DISASSEMBLE and INSPECT the forward (1, 2, 3, 4) clutch friction and steel plates. INSTALL new components as necessary. Refer to: Forward Clutch Assembly .